Darkroom Photography w/ Sepia Tone. Sepia toning is a specialized treatment to give a black-and-white photographic print a warmer tone and to enhance its archival qualities. While I was toning this print I was surprised to learn that you bleach the image until it nearly disappears on the print, but it comes back when you run it through the sepia toning chemicals.

Darkroom Photography w/ Sepia Tone. Sepia toning is a specialized treatment to give a black-and-white photographic print a warmer tone and to enhance its archival qualities. While I was toning this print I was surprised to learn that you bleach the image until it nearly disappears on the print, but it comes back when you run it through the sepia toning chemicals.